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The current R is the result of a collaborative effort with contributions from all over the world. R was initially written by Robert Gentleman and Ross Ihaka—also known as “R & R” of the Statistics Department of the University of Auckland. Since mid-1997 there has been a core group with write access to the R source, currently consisting of

Douglas Bates

John Chambers

Peter Dalgaard

Robert Gentleman

Kurt Hornik

Ross Ihaka

Tomas Kalibera

Michael Lawrence

Friedrich Leisch

Uwe Ligges

Thomas Lumley

Martin Maechler

Martin Morgan

Paul Murrell

Martyn Plummer

Brian Ripley

Deepayan Sarkar

Duncan Temple Lang

Luke Tierney

Simon Urbanek

plus Heiner Schwarte up to October 1999, Guido Masarotto up to June 2003, Stefano Iacus up to July 2014, Seth Falcon up to August 2015, and Duncan Murdoch up to September 2017.

R would not be what it is today without the invaluable help of these people, who contributed by donating code, bug fixes and documentation:

We have probably omitted some important names here because of incomplete record keeping. If we have overlooked you, please let us know and we’ll update the list. Many more, too numerous to mention here, have contributed by sending bug reports and suggesting various improvements. Simon Davies whilst at the University of Auckland wrote the original version of glm(). Julian Harris and Wing Kwong (Tiki) Wan whilst at the University of Auckland assisted Ross Ihaka with the original Macintosh port.

R was inspired by the S environment which has been principally developed by John Chambers, with substantial input from Douglas Bates, Rick Becker, Bill Cleveland, Trevor Hastie, Daryl Pregibon and Allan Wilks. A special debt is owed to John Chambers who has graciously contributed advice and encouragement in the early days of R and later became a member of the core team.